Seiko Cal. 6291 - 931

This Spring Drive model from 1981 features a 40mm PVD Black case. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5b1ad260ed92]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1981

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